#include<stdlib.h>
#include<stdio.h>
#include<sys/types.h>
#include<sys/stat.h>
#include<unistd.h>
#include<time.h>


int main(int argc,char **argv){

   time_t tn;
   struct tm *tmp;
   time(&tn);
   tmp = localtime(&tn);
   char dd[24];
   strftime(dd,24,"%H:%M:%S",tmp);
   printf(" %s \n",dd);
   strftime(dd,24,"%R:%S",tmp);
   printf(" %s \n",dd);
   strftime(dd,24,"%F %T",tmp);
   printf(" %s \n",dd);
   




   return 0;
}